gemini-code-assist[bot] commented on PR #37151: URL: https://github.com/apache/beam/pull/37151#issuecomment-3675093847
## Summary of Changes Hello @arunpandianp, I'm Gemini Code Assist[^1]! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed! This pull request introduces a significant architectural change to how state and timer tags are encoded within the Windmill backend for Dataflow streaming jobs. By abstracting the encoding logic behind a new `WindmillTagEncoding` interface, it paves the way for `WindmillTagEncodingV2`, an experimental encoding scheme. This refactoring allows for future improvements in efficiency or functionality of tag handling, with the new version being opt-in via an experiment flag for cautious evaluation. ### Highlights * **New Windmill Tag Encoding (V2)**: Introduced `WindmillTagEncodingV2`, a new way of encoding Windmill state tags and timer tags. This new encoding is currently behind an unstable experiment flag and is not yet ready for production workloads. * **Refactoring with `WindmillTagEncoding` Interface**: A new abstract class `WindmillTagEncoding` has been added, defining a common interface for encoding state and timer tags. The existing `WindmillStateTagUtil` has been renamed to `WindmillTagEncodingV1` and now implements this interface, maintaining backward compatibility. * **Dynamic Encoding Selection**: The `StreamingModeExecutionContext` now dynamically selects between `WindmillTagEncodingV1` and `WindmillTagEncodingV2` based on an experiment flag, allowing for controlled rollout and testing of the new encoding. * **Core State API Enhancements**: Added `getWindowCoder()` methods to `StateNamespaces` classes and `getKind()` and `isSystemTagInternal()` methods to `StateTags` to support the new encoding logic. * **Widespread Integration**: Multiple components, including `WindmillKeyedWorkItem`, `WindmillTimerInternals`, `CachingStateTable`, `WindmillCombiningState`, and `WindmillStateInternals`, have been updated to use the new `WindmillTagEncoding` interface, ensuring consistent tag handling across the Dataflow worker. 🧠**New Feature in Public Preview:** You can now enable **Memory** to help **Gemini Code Assist** learn from your team's feedback. 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